drm/amd/display: Enumerate LTTPR modes

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[WHY]
There are three possible modes for LTTPR:
- Non-LTTPR mode, where AUX timeout is 400 us and no per-hop link
training is done
- LTTPR Transparent mode, where AUX timeout is 3200 us and no per-hop
link training is done
- LTTPR Non-Transparent mode, where AUX timeout is 3200 us and per-hop
link training is done

[HOW]
Use an enum instead of a bool to track LTTPR state; modify comparisons
accordingly.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Wesley Chalmers 2021-03-15 18:40:08 -04:00 • committed by Alex Deucher

parent dd8a86877e

commit 3128b28502

3 changed files with 32 additions and 12 deletions

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33

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

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2

drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c

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9

drivers/gpu/drm/amd/display/dc/dc_link.h

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